So, I've made a bit of a fool of myself by briefly disconnecting my Battery just because I wanted to get some parasitic drain figures. This has ended up causing me problems - curiosity killed the cat!
I only had the earth lead off for a few seconds (this is actually correct procedure before recharging, according to the manual) and since reconnecting I have the faults, "PKSB unavailable" and "Parking assist unavailable" showing alternately on the dashboard.
I've connected with Carista a